Montana alluvial garnets, provenance certified

Every parcel we weigh comes directly out of Montana gravel, hand-graded and documented in our Great Falls workshop.

Precision lapidary and verified rough

Rigorous geological documentation and direct-from-source sorting for custom jewelers and collectors.

Sorted Alluvial Rough

Custom Lapidary Cutting

Mineralogical Assays

Raw almandine and pyrope parcels sorted by weight, clarity, and crystal morphology directly from regional gravels.

Bench cutting optimized for natural optical fire, precise pavilion angles, and maximum carat weight retention.

Complete geological documentation accompanying all raw parcels and faceted stones with verified deposit origins.

Almandine-Pyrope parameters

3.65 - 3.8

specific gravity range

1.74 - 1.76

refractive index index

Unaltered

thermal treatment status

For certified regional rough or custom lapidary specifications, contact our Great Falls bench directly.